{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Altogether , we demonstrated that the microneedle arrays can be fabricated through a simple single - step process and needles were mechanically strong to penetrate skin , increasing the permeability of encapsulated drug through skin ."}
{"Chemical": []}